Button for a switch panel user interface



FIG. 1 is a perspective view of a button for a switch panel user interface showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof; and,

FIG. 4 is a side view thereof.

The dashed broken lines represent structure or features which form no part of the claimed design; the broken lines themselves form no part of the claimed design.

The dot-dash broken lines represent boundaries of the claimed design; the dot-dash broken lines themselves form no part of the claimed design. 

CLAIM The ornamental design for a button for a switch panel user interface, as shown and described. 